What size hole for my Delta Shower valve should I cut out in exterior wall?

Discussion in 'General Plumbing Help' started by BRrenovator, Jan 15, 2016.

Help Support Plumbing Forums by donating:

  1. Jan 15, 2016 #1

    BRrenovator

    BRrenovator

    BRrenovator

    Active Member

    Joined:
    Feb 26, 2015
    Messages:
    30
    Likes Received:
    0
    Location:
    ,
    Hello,

    I have a Delta R10000-PX Multichoice Universal Rough Valve Body. I'm using the Schluter Kerdi materials in my bathroom. I'm not sure whether I should use the Kerdi Seal MV for the shower valve - KMSMV235/114. It's a 4 1/2" seal. Neither Schluter or Delta would tell me what size hole to cut in the exterior wall (1/2" Kerdi board).

    The exterior wall in this shower stall will be tiled? What size hole should I cut in the exterior wall? Should I use this seal? Why or why not?

    https://youtu.be/Ri0jru_o4E0
    See video at 4:39 to 4:55 mark

    Thanks much,

    Delta R10000 PX Multichoice Universal Rough Valve Body Pex crimp connections with universal outl.jpg
     
  2. Jan 15, 2016 #2

    frodo

    frodo

    frodo

    Just call me Macgyver Professional Supporting Member

    Joined:
    Sep 28, 2014
    Messages:
    7,400
    Likes Received:
    2,312
    Location:
    ,
    how big is the trim face plate? hole needs to be smaller than the trim plate
     
    BRrenovator likes this.
  3. Jan 15, 2016 #3

    johnjh2o

    johnjh2o

    johnjh2o

    Senior Member Professional

    Joined:
    Jul 21, 2011
    Messages:
    3,223
    Likes Received:
    740
    Location:
    Melbourne, Florida
    There should be a plastic cover that came with the valve body which is the size the cut out should be.
     
    phishfood, BRrenovator and SHR like this.
  4. Jan 16, 2016 #4

    Matt30

    Matt30

    Matt30

    Professional Professional

    Joined:
    Jan 17, 2012
    Messages:
    2,092
    Likes Received:
    807
    Location:
    Halifax, Nova Scotia
    If you don't have that plastic cover, just remember the hole must be smaller than the trim plate but you must have access to the holes to screw the trim plate into the valve body
     
    BRrenovator and SHR like this.
  5. Jan 16, 2016 #5

    journeyman

    journeyman

    journeyman

    the professional

    Joined:
    Oct 4, 2012
    Messages:
    538
    Likes Received:
    165
    Location:
    san diego, california
    I usually just use a 3 inch hole saw it will give you the room you need
     
    BRrenovator and SHR like this.
  6. Jan 16, 2016 #6

    KULTULZ

    KULTULZ

    KULTULZ

    Jack of All Trades ~ Master of None Professional

    Joined:
    Sep 4, 2011
    Messages:
    1,534
    Likes Received:
    316
    Location:
    Between Lost And Found, W (BY GOD) V
    Where is the mud ring that came with the kit?

    If you are CDO (correct alphabetical order) like myself :p , order a replacement mud ring for exact hole size.
     
    BRrenovator likes this.
  7. Jan 17, 2016 #7

    BRrenovator

    BRrenovator

    BRrenovator

    Active Member

    Joined:
    Feb 26, 2015
    Messages:
    30
    Likes Received:
    0
    Location:
    ,
    The Kerdi mixing valve seal is 4 1/2" round. The plastic guard that came with the valve is square.

    I wanted to use the Kerdi seal and caulk around the trimplate. I was thinking I would use the Kerdi seal hole as a template for the hole in the Kerdi board. I'll check to see if it's smaller than the trimplate. If I don't use the Kerdi seal, do I just use silicon caulk around the trimplate on the finished wall? What's the best practice?

    Thanks much
     
  8. Jan 17, 2016 #8

    Matt30

    Matt30

    Matt30

    Professional Professional

    Joined:
    Jan 17, 2012
    Messages:
    2,092
    Likes Received:
    807
    Location:
    Halifax, Nova Scotia
    The trim plate should have a foam gasket on the back. No silicone required.
     
    BRrenovator likes this.
  9. Jan 17, 2016 #9

    BRrenovator

    BRrenovator

    BRrenovator

    Active Member

    Joined:
    Feb 26, 2015
    Messages:
    30
    Likes Received:
    0
    Location:
    ,
    There is a gasket that goes over the valve/cartridge, and then there is a styrofoam ring on the outer edge of the trimplate. Since the hole in the wall will be larger than the hole for the valve/cartridge, how is the water prevented from getting behind the finished wall?

    IMG_1393_opt.jpg

    IMG_1394_opt.jpg
     
  10. Jan 17, 2016 #10

    Matt30

    Matt30

    Matt30

    Professional Professional

    Joined:
    Jan 17, 2012
    Messages:
    2,092
    Likes Received:
    807
    Location:
    Halifax, Nova Scotia
    You answered your own question. The gasket on the outer edge of the trim plate
     
    Last edited: Jan 18, 2016
    BRrenovator likes this.

Share This Page